Jeff Overton’s eight-under-par second round gave the American a commanding four-stroke lead at the halfway stage of the Greenbrier Classic in West Virginia.
The Indiana native carded eight birdies against no bogeys to sit 14 under par and lead compatriot Boo Weekley by four.
Overton has not yet registered a win on the PGA Tour but has been knocking on the door of late, with six top-12 finished in the last three months.
Weekley also went round without a dropped shot in his seven-under round of 63.
Neither of the overnight joint leaders set the world alight today, but Erik Compton did at least stay in contention with his round of 68 putting him tied for third on nine under, alongside Jimmy Walker.
Matt Every, who like Compton was seven under overnight, could only go round in two over today thanks in part to a double bogey on the 17th and will go into the weekend tied for 27th.
Only three Europeans made the cut, in the shape of Swedes Richard S Johnson and Carl Pettersson, and Spain’s Sergio Garcia.
Of them, Johnson is best placed, his round of 67 putting him seven under for the weekend, while Garcia posted a similar round to sit alongside Every on five under.
None of the British contingent made the cut, which was set at two under, with Greg Owen level after two rounds, while Brian Davis and Martin Laird were four and five over respectively - the latter after a horrible second-round 76 which contained two double bogeys.